Abstract: As marine environment becomes increasingly complex, the deployment of warships in different military tasks, including both single warship deployment as well as multi-warship coordination, is often discussed. This paper analyzes the main factors that influence the deploy ability of warships of the same type when the warship comes into service, plans repairing interval, schedules control and etc. Based on the analysis, the measurement indicators for concurrent deploy ability of identical warships are constructed, and the corresponding model and the simulation algorithm is provided. The proposed approach is seen to be a good solution to the difficulties in calculating concurrent deploy ability. Finally, the simulation results suggest that all the factors are of vital significance to the deploy ability; particularly, as the maintenance interval increases, the deploy ability shows S-shape growth. In brief, this approach plays a significant role for optimizing maintenance structures, promoting the deploy ability of identical warships and reducing the maintenance cost.